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Mind blowing physics. Aerospace engineers reveal that a returning spacecraft carries two thousand times more kinetic energy than a commercial jet. It hits the atmosphere so hard it compresses air into a white hot shockwave reaching half the temperature of the sun.

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Furkan Gözükara

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187,037 просмотров • 4 месяцев назад •via X (Twitter)

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When astronauts return to Earth, their spacecraft hits the atmosphere at 17,500 mph, facing temperatures up to 3,000°F. So why doesn't it melt? Modern spacecraft rely on advanced heat shields covered in silica-based materials, a technology pioneered by the Space Shuttle. These thermal tiles are made of over 90% trapped air, and because air is a terrible heat conductor, the outside can face a firestorm while the inside stays safely cool. The result feels impossible: a tile can be pulled glowing hot straight out of a furnace and immediately picked up with bare hands. Source: EntirelyEngineering8

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The impact Starship is having just locally is mind blowing. Add to that the announcement of the plan to move nearly half of the entire Starlink constellation into lower orbits this year, and it has been a surprising week. 🚀 2026 is going to kick it! 🤯

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ELON MUSK: SKIP TINY FUSION, USE THE SUN "I think anyone who looks at the math can see that you can make a reactor that generates more energy than it consumes. The bigger you make it, the easier it is. In the limit, you just have a giant gravitationally contained thermonuclear reactor like the sun, which requires no maintenance and is free. So why bother making a little itty-bitty sun that's so microscopic you'd barely notice it on Earth when we've got a giant free one in the sky?" Source: Elon Musk

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This guy somehow managed to make me fully believe that a yellow balloon had a mind of its own and was breaking the laws of physics for two and a half minutes.
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This guy somehow managed to make me fully believe that a yellow balloon had a mind of its own and was breaking the laws of physics for two and a half minutes.

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